what is prox and cloud in vvdi remote list?

In VVDI MINI, VVDI MAX, Key Tool Plus vehicle remote list, it has cloud and proxy, what is prox and cloud?

what-is-prox-and-cloud-in-vvdi-remote-list-1 what-is-prox-and-cloud-in-vvdi-remote-list-2

Prox is keyless go. You can keep the key in your pocket to start the car.

Cloud, meaning can only be generated online.

Cloud is only available for VVDI 2 device and VVDI key tool max, as the data is big.

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